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What occurs in the Solvay process?

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Ammonia and carbon dioxide are passed into a saturated sodium chloride solution to form soluble ammonium hydrogen carbonate, which reacts with the sodium chloride to form soluble ammonium chloride and a precipitate of sodium hydrogen carbonate (sodium bicarbonate) if the temperature is maintained below 15°C. The sodium hydrogen carbonate is filtered off and heated to produce sodium carbonate.

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